Symthom of bad manifold absolute pressure sensorVehicles with a bad manifold absolute pressure (MAP) sensor typically run rough while accelerating, decelerating or idling. Other common symptoms include increased fuel consumption and sudden jerks or hesitation while accelerating. Drivers may detect a strong smell of gas after the engine has warmed up.

Technical data:Pressure range bar: 0.1 - 1.115
Number of ports: 4

Info:Manifold Absolute Pressure Sensors, or MAP Sensors as they are more commonly known, are used to measure inlet manifold "pressure" to give an indication of engine load.
These sensors are generally used in "Speed/Debsity" or "Manifold Pressure Controlled" engine management system that do not use an Air Flow/Mass Sensor.

Sensors have either over three or four poles:

Mass

Output signal, 0 to 4.5 Volt

Supply voltage, mostly 5.0 Volt

Optional: Temperature measurement (NTC)

Faulty MAP sensor symthoms:

Rough idle.

Surging.

Loss of power and/or fuel economy die to retarded timing and an excessively rich fuel ratio.